This is the one with the two piece lever right?
Yes, they can be a pain, but most of the time it doesn't take too long.
It has been a while, so bear with me.
Bolt in first, all the way shut.
Cam gear and half of the lever (rack) in next, but leave the spacer next to the gear out.
The rack has a detent plunger on it that detents on the hammer pin. Slide the gear out of engagement on the pin. Position the rack so the detent is just cammed over the hammer pin, then slide the gear in to position.
Install the lever, and test. If you need a little adjustment, take the lever out, but leave the pin still in the rack. Then you can hold the rack, slide the gear, adjust a tooth in the direction you need to go. Install lever and re-test. Sometimes you can do the adjusting with the bolt half open so you don't have to fight any spring pressure.
When it is all set, remove the gear pin enough to slip the spacer in with a hemostat, and fully seat all the pins.
Hope this helps. Hard doing off memory without doing one, or even having one to look at.
If you still don't get it, let me know, and I may be able to find one at work. I can't remember if we have one there or not.
The last one I did was the biggest PIA one I have done, but it ended up being burred up from the kid that took it apart and tried to put it back together.... Wasn't too bad once I realized the burrs.
Denny